JP6939147B2 - Driving information guidance device and computer program - Google Patents

Description

The present invention relates to a traveling information guidance device and a computer program for guiding information on traveling of a vehicle.

Conventionally, various means have been used as information providing means for providing various information regarding the running of the vehicle to the driver of the vehicle. For example, a display on a liquid crystal display installed in a vehicle, a sound output from a speaker, or the like. In recent years, as the functions of vehicles have become multifunctional, the amount of information to be provided to drivers has also increased. For example, in addition to the vehicle speed and shift position, ACC (Adaptive Cruise Control) set values, eco-indicators, lane guidance, intersection enlarged views, and the like.

However, it is difficult to simultaneously provide such a large amount of information to a driving driver. Therefore, the type of information to be provided is selected by the operation of the driver. Further, for example, Japanese Patent Application Laid-Open No. 2016-190634 includes a plurality of information providing formats in which the types and methods of providing information are different, and by sequentially switching the information providing formats at predetermined time intervals, a large amount of information can be obtained by the driver. The technology provided to is disclosed.

Japanese Unexamined Patent Publication No. 2016-190634 (FIGS. 5 to 12)

Here, the types of information required by the driver are narrowed down in advance according to the current situation of the vehicle. For example, when traveling on a highway, an enlarged view of an intersection is not required so much, and when traveling on a general road where traveling by ACC is not generally performed, a set value of ACC is not required so much. However, in the method of selecting the type of information to be provided by the driver's operation, it is necessary for the driver to perform an operation for switching the information to be provided every time the situation of the vehicle changes. On the other hand, in the technique described in Patent Document 1, there is a period in which information necessary for the driver is not displayed or a period in which information that is not so necessary is displayed in the process of switching the format.

The present invention has been made to solve the above-mentioned conventional problems, and when providing information on the running of a vehicle by displaying it in a display area, the display mode differs between items according to the situation of the vehicle. It is an object of the present invention to provide a driving information guidance device and a computer program that can appropriately provide necessary information to the driver by providing and displaying the information.

In order to achieve the above object, the driving information guidance device according to the present invention provides a situation acquisition means for acquiring the current vehicle condition, a line-of-sight position acquisition means for acquiring the driver's line-of-sight position, and information on the vehicle's running. Has an information display means for displaying in a visible display area, and there are a plurality of items to be displayed in the display area as information related to the driving of the vehicle, and the items are displayed in the display area for each vehicle condition. A learning means for learning the ratio of the driver's line of sight staying for a plurality of items by relative evaluation between the items is provided, and the information display means learns the learning means corresponding to the current vehicle situation. Based on the result, the display modes of the plurality of items are displayed with a difference.
The "driver's line of sight position" is a point where the driver's line of sight is located, and is a point where an object (for example, a display area) that the driver sees intersects with the driver's line of sight (line of sight). .. Further, the "driver's line-of-sight position" may be any one that can specify the driver's line-of-sight position in addition to the driver's line-of-sight position itself, and includes an image of the driver's eyes and the like.

Further, the computer program according to the present invention is a program that provides various information regarding traveling to the vehicle. Specifically, the computer displays a status acquisition means for acquiring the current vehicle status, a line-of-sight position acquisition means for acquiring the driver's line-of-sight position, and information on the driving of the vehicle in a display area visible to the driver. There are a plurality of items to be displayed in the display area as information related to the traveling of the vehicle and the information display means to be used, and the line-of-sight position of the driver is determined for the plurality of items displayed in the display area for each vehicle condition. It is a computer program for functioning as a learning means for learning the ratio of staying by relative evaluation between items. Further, the information display means displays the plurality of items with a difference in the display mode based on the learning result of the learning means corresponding to the current vehicle situation.

According to the traveling information guidance device and the computer program according to the present invention having the above-described configuration, when the information related to the traveling of the vehicle is provided by displaying it in the display area, the display mode differs between the items according to the situation of the vehicle. By providing and displaying the information, it is possible to appropriately provide the necessary information to the driver even when there is a large amount of information to be provided. In addition, it is possible to grasp what kind of information is required for each driver and each vehicle situation from the learning result. As a result, even when there is a large amount of information to be provided, it is possible to appropriately provide the necessary information to the driver.

It is a schematic block diagram of the traveling information guidance device which concerns on this embodiment. It is a block diagram which showed the navigation device which concerns on this embodiment. It is a flowchart of the traveling information guidance processing program which concerns on this embodiment. It is a figure which showed an example of the basic display data table. It is a figure which showed an example of the learning result stored in a learning DB. It is a figure which showed the display example which displayed the information which concerns on running without providing the luminance difference. It is a figure explaining the method of specifying the line-of-sight position of an occupant. It is a figure which showed the display example which displayed the information which concerns on running by providing the luminance difference.

Hereinafter, a detailed description will be given with reference to the drawings based on an embodiment embodying the traveling information guidance device according to the present invention. First, the schematic configuration of the traveling information guidance device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a traveling information guidance device 1 according to the present embodiment.

As shown in FIG. 1, the traveling information guidance device 1 includes a navigation device 3 mounted on the vehicle 2 and a head-up display device (hereinafter referred to as HUD) 4 mounted on the vehicle 2 and connected to the navigation device 3. And basically have.

Here, the navigation device 3 is set to search for a recommended route to the destination, display a map image around the current position of the vehicle 2 based on the map data acquired from the server or stored in the memory. It has a function of providing movement guidance along the guide route and guidance of various information related to the running of the vehicle 2 together with the HUD4. It should be noted that it is not necessary for the navigation device 3 to have all of the above functions, and the present invention can be configured as long as it has at least a function of guiding various information related to the traveling of the vehicle 2. The details of the structure of the navigation device 3 will be described later.

On the other hand, the HUD 4 is installed inside the dashboard 5 of the vehicle 2, and has a liquid crystal display 6 which is an image display surface on which an image is displayed. Then, the image projected on the liquid crystal display 6 is reflected on the front window 8 in front of the driver's seat via the concave mirror 7 and the like provided in the HUD 4 as described later, and is configured to be visually recognized by the occupant 9 of the vehicle 2. ing. The images displayed on the liquid crystal display 6 include information on the vehicle 2 and various information used to support the driving of the occupant 9. For example, a warning to an object (another vehicle or a pedestrian) to be warned to the occupant 9, a guidance route set by the navigation device 3, guidance information based on the guidance route (arrow indicating the right / left turn direction, etc.), on the road surface. Warnings to be displayed (rear-end collision caution, speed limit, etc.), current vehicle speed, shift position, lane guidance, crossroads enlarged map, ACC (Adaptive Cruise Control) setting values, eco-indicators, guidance signs, map images, traffic information, news, weather There are forecasts, times, connected smartphone screens, TV programs, etc.

Further, in the HUD 4 of the present embodiment, when the occupant 9 reflects the front window 8 and visually recognizes the image displayed on the liquid crystal display 6, the occupant 9 is not at the position of the front window 8 but at the tip of the front window 8. The image displayed on the liquid crystal display 6 at a distant position is visually recognized as a virtual image 10. Further, the virtual image 10 is displayed by superimposing it on the visual field of the occupant 9, and can be displayed by superimposing it on an arbitrary object (such as an object to be warned) located in the visual field area of the occupant 9, for example. Is. The virtual image 10 that can be visually recognized by the occupant 9 is an image displayed on the liquid crystal display 6, but the vertical direction and the horizontal direction may be reversed by passing through the concave mirror 7 and other mirrors. It is necessary to display the image of the liquid crystal display 6. The size is also changed via the concave mirror 7.

Here, regarding the position where the virtual image 10 is generated, more specifically, the distance L from the occupant 9 to the virtual image 10 (hereinafter referred to as the virtual image generation distance) L, the curvature of the concave mirror 7 provided in the HUD 4, the liquid crystal display 6 and the concave mirror 7 It is possible to set appropriately according to the relative position of. For example, if the curvature of the concave mirror 7 is fixed, the virtual image generation distance L is determined by the distance (optical path length) along the optical path from the position where the image is displayed on the liquid crystal display 6 to the concave mirror 7. For example, the optical path length is set so that the virtual image generation distance L is 25 m.

Further, in the present embodiment, HUD4 is used as a means for displaying an image superimposed on the field of view of the occupant 9, but other means may be used. For example, a window shield display (WSD) that displays an image on the front window 8 may be used. For example, the front window 8 may be used as a screen to display an image from the projector, or the front window 8 may be used as a transmissive liquid crystal display. The image displayed on the front window 8 by the WSD is an image superimposed on the field of view of the occupant 9 as in the HUD4.

Further, the front camera 11 is installed above the front bumper of the vehicle, behind the rearview mirror, and the like. The front camera 11 is an image pickup device having a camera using a solid-state image sensor such as a CCD, and is installed with the optical axis direction facing forward in the traveling direction of the vehicle. Then, by performing image processing on the captured image captured by the front camera 11, the situation of the front environment (that is, the environment in which the virtual image 10 is superimposed) visually recognized by the occupant 9 through the front window 8 is detected. Will be done. A sensor such as a millimeter wave radar may be used instead of the front camera 11.

In addition, an in-vehicle camera 12 is installed on the upper surface of the instrument panel of the vehicle. The in-vehicle camera 12 is an image pickup device having a camera using a solid-state image sensor such as a CCD, and is installed with the optical axis direction facing the driver's seat. Then, the face of the occupant 9 sitting in the driver's seat is imaged. Then, image processing is performed on the captured image captured by the in-vehicle camera 12, so that the eye position (line-of-sight start point) and the line-of-sight direction of the occupant 9 are detected.

Next, a schematic configuration of the navigation device 3 constituting the traveling information guidance device 1 will be described with reference to FIG. FIG. 2 is a block diagram showing a navigation device 3 according to the present embodiment.

As shown in FIG. 2, the navigation device 3 according to the present embodiment includes a current position detection unit 13 that detects the current position of the vehicle 2 on which the navigation device 3 is mounted, and a data recording unit 14 in which various data are recorded. , A navigation ECU 15 that performs various arithmetic processes based on the input information, an operation unit 16 that receives operations from the user, and a liquid crystal display 17 that displays a map around the vehicle and facility information related to the facility to the user. Communication between a speaker 18 that outputs voice guidance regarding route guidance, a DVD drive 19 that reads a DVD as a storage medium, and an information center such as a VICS (registered trademark: Vehicle Information and Communication System) center. It has a module 20 and. Further, the navigation device 3 is connected to the above-mentioned HUD4, the front camera 11, the in-vehicle camera 12, and the like via an in-vehicle network such as CAN.

Hereinafter, each component of the navigation device 3 will be described in order.
The current position detection unit 13 includes a GPS 21, a vehicle speed sensor 22, a steering sensor 23, a gyro sensor 24, and the like, and can detect the current position and direction of the vehicle, the traveling speed of the vehicle, the current time, and the like. .. Here, in particular, the vehicle speed sensor 22 is a sensor for detecting the moving distance and the vehicle speed of the vehicle, generates a pulse according to the rotation of the drive wheels of the vehicle, and outputs the pulse signal to the navigation ECU 15. Then, the navigation ECU 15 calculates the rotation speed and the moving distance of the drive wheels by counting the generated pulses. It is not necessary for the navigation device 3 to include all of the above four types of sensors, and the navigation device 3 may include only one or a plurality of of these sensors.

Further, the data recording unit 14 reads a hard disk (not shown) as an external storage device and a recording medium, a map information DB 31 and a learning DB 32 recorded on the hard disk, a predetermined program, and the like, and writes predetermined data to the hard disk. It is equipped with a recording head (not shown), which is a driver for this purpose. The data recording unit 14 may have a flash memory, a memory card, an optical disk such as a CD or a DVD, instead of the hard disk. Further, the map information DB 31 and the learning DB 32 may be stored in an external server and acquired by the navigation device 3 by communication.

Here, the map information DB 31 is, for example, link data 33 related to a road (link), node data 34 related to a node point, point data 35 related to a point such as a facility, intersection data related to each intersection, and map display data for displaying a map. , A storage means in which search data for searching a route, search data for searching a point, and the like are stored.

Here, as the link data 33, for example, a link ID that identifies the link, end node information that identifies a node located at the end of the link, a road type of a road that the link constitutes, and the like are stored. .. Further, as the node data 34, a node ID that identifies the node, position coordinates of the node, connection destination node information that identifies the connection destination node to which the node is connected via a link, and the like are stored. Further, as the point data 35, various information regarding the facility to be set to the destination is stored. For example, an ID that identifies the facility, a facility name, position coordinates, a genre, an address, and the like are stored.

Further, the learning DB 32 is a storage means that accumulates and stores the staying mode of the line-of-sight position of the occupant 9 of the vehicle for each item of information with respect to various information related to the running of the vehicle that is a display target candidate by the HUD4. Further, in the present embodiment, the staying mode of the line-of-sight position of the occupant 9 is learned especially for each vehicle condition (more specifically, for each road type on which the vehicle travels). That is, in the learning DB 32, as a learning value, for each vehicle situation, which item of each information as a display target candidate is visually recognized by the vehicle occupant 9 by the HUD4 (number of visual recognitions, visual recognition time, visual recognition ratio, etc.). It will be accumulated and stored. Then, the navigation ECU 15 sets the display mode of the information of the HUD 4 based on the learning value stored in the learning DB 32 as described later. The details of the learning value stored in the learning DB 32 will be described later.

On the other hand, the navigation ECU (electronic control unit) 15 is an electronic control unit that controls the entire navigation device 3, and is a computing device, a CPU 41 as a control device, and a working memory when the CPU 41 performs various arithmetic processes. In addition to the RAM 42 that stores the route data when the route is searched, the control program, the basic display data table (Fig. 4) and the driving information guidance processing program (Fig. 3), which will be described later, etc. It is provided with an internal storage device such as a ROM 43 in which data is recorded and a flash memory 44 for storing a program read from the ROM 43. The navigation ECU 15 has various means as a processing algorithm. For example, the status acquisition means acquires the current vehicle status. The line-of-sight position acquisition means acquires the line-of-sight position of the driver. The information display means displays information on the running of the vehicle in a display area that can be seen by the driver.

The operation unit 16 is operated when inputting a starting point as a traveling start point and a destination as a traveling end point, and has a plurality of operation switches (not shown) such as various keys and buttons. Then, the navigation ECU 15 controls to execute various corresponding operations based on the switch signals output by pressing each switch or the like. The operation unit 16 may have a touch panel provided on the front surface of the liquid crystal display 17. It may also have a microphone and a voice recognition device.

Further, on the liquid crystal display 17, map images including roads, traffic information, operation guidance, operation menus, key guidance, guidance routes from the departure point to the destination, guidance information along the guidance routes, news, weather forecasts, etc. The time, mail, TV program, etc. are displayed. Since the HUD 4 is provided as the information display means in the present embodiment, the liquid crystal display 17 may be omitted if the HUD 4 is used to display the map image or the like.

Further, the speaker 18 outputs voice guidance for guiding the traveling along the guidance route and traffic information guidance based on the instruction from the navigation ECU 15.

The DVD drive 19 is a drive capable of reading data recorded on a recording medium such as a DVD or a CD. Then, based on the read data, music or video is reproduced, the map information DB 31 is updated, and the like. A card slot for reading and writing a memory card may be provided instead of the DVD drive 19.

Further, the communication module 20 is a communication device for receiving traffic information including various information such as traffic jam information, regulation information, and traffic accident information transmitted from a traffic information center, for example, a VICS center or a probe center. For example, mobile phones and DCM.

Subsequently, among the traveling information guidance devices 1 having the above configuration, a traveling information guidance processing program executed by the navigation device 3 will be described with reference to FIG. FIG. 3 is a flowchart of the traveling information guidance processing program according to the present embodiment. Here, the traveling information guidance processing program is a program that is executed after the ACC power supply (accessory power supply) of the vehicle is turned on, and guides various information related to the traveling of the vehicle to the occupant 9 of the vehicle 2 using the HUD4. The program shown in the flowchart in FIG. 3 below is stored in the RAM 42 or ROM 43 included in the navigation device 3 and is executed by the CPU 41.

First, in the traveling information guidance processing program, in step 1 (hereinafter, abbreviated as S) 1, the CPU 41 acquires the current vehicle status. In the present embodiment, the road type of the road on which the vehicle is currently traveling is acquired as the vehicle status. Specifically, the CPU 41 first identifies the current position of the vehicle by the current position detection unit 13, and performs map matching processing using the map data stored in the map information DB 31 to specify the link on which the vehicle travels. After that, the road type of the link on which the vehicle travels is specified using the link data 33. In the following explanation, the road types will be defined as three types: "expressway", "general road (national road, prefectural road, etc.)", and "narrow street".

Next, in S2, the CPU 41 selects an item to be displayed as a display target candidate among a plurality of items to be displayed as information on the running of the vehicle, based on the vehicle condition acquired in S1. In particular, in the present embodiment, as shown in FIG. 4, items to be displayed are preset for each vehicle condition (road type on which the vehicle travels) by the basic display data table. The basic display data table is stored in the ROM 43, the flash memory 44, or the like.

As shown in FIG. 4, the items to be displayed as information on the running of the vehicle in the present embodiment are "vehicle speed", "shift position", "setting value of ACC (Adaptive Cruise Control)", and "enlarged view of intersection". , "Lane guidance" and "Eco indicator".

Here, "vehicle speed" is information on the current vehicle speed of the vehicle. The "shift position" is information about the current shift position of the vehicle. The "ACC (Adaptive Cruise Control) set value" is information on the inter-vehicle distance to the vehicle in front and the traveling vehicle speed, which are the set values of the ACC. The "intersection enlarged view" is information on the shape of the guide intersection through which the vehicle passes next and the traveling direction of the vehicle at the guide intersection. "Lane guidance" is information on the traveling direction classification for each lane of the link on which the vehicle travels. The "eco-indicator" is information on the level of eco-driving of the driver.

Then, as shown in FIG. 4, in the basic display data table, especially when the vehicle travels on the highway, "vehicle speed", "shift position", "ACC (Adaptive Cruise Control) setting value", and "eco indicator" ] Is associated with the display target. When the vehicle travels on a general road, five items of "vehicle speed", "shift position", "enlarged view of intersection", "lane guidance", and "eco-indicator" are associated with each other as display targets. Further, when the vehicle travels on a narrow street, three items of "vehicle speed", "shift position", and "enlarged view of intersection" are associated with each other as display targets. In the basic display data table, the items associated with each vehicle status as display targets are information items predicted to be necessary by the driver in the vehicle status. On the other hand, items that are not associated with each vehicle status as display targets in the basic display data table are information items that are not expected to be needed by the driver in that vehicle status. That is, when the vehicle travels on the highway, ACC may be used, so the "ACC set value" is displayed, but since the intersection basically does not exist, the "intersection enlarged view" Is excluded from the display target.

Subsequently, in S3, the CPU 41 refers to the learning DB 32 and determines whether or not there is a learning result corresponding to the current vehicle condition acquired in S1. Here, in the present embodiment, for each vehicle situation (more specifically, for each road type on which the vehicle travels), for various information regarding the traveling of the vehicle that is a candidate for display by HUD4, the vehicle for each information item Learn how to stay at the line-of-sight position of the occupant 9. More specifically, the ratio of "the number of times the driver has visually recognized" or "the time the driver has visually recognized" (that is, the ratio of staying at the line-of-sight position) is learned.

For example, when the vehicle travels on the highway, "the number of times the driver has visually recognized" or "driving" for each item of information displayed by HUD4 during the period from the start to the end of the highway. The "time visually recognized by the person" is counted as a learning value and stored in the learning DB 32. Then, the counted number of times or time is statistic for each item, and the ratio of "the number of times the driver has visually recognized" or "the time visually recognized by the driver" is further stored in the learning DB 32 as a learning result. Further, the learning DB 32 is updated at any time every time the vehicle travels.

Here, FIG. 5 is a diagram showing an example of the learning result stored in the learning DB 32. As shown in FIG. 5, in the learning DB 32, the ratio of "the number of times the driver has visually recognized" or "the time the driver has visually recognized" is stored as a learning result for each vehicle condition (road type on which the vehicle travels). .. For example, in the learning results shown in FIG. 5, when the vehicle travels on the highway, the "vehicle speed" is 30%, the "shift position" is 10%, the "ACC set value" is 50%, and the "eco indicator". It can be seen that is visually recognized at a rate of 10%.

Then, when it is determined that the learning result corresponding to the current vehicle condition acquired in S1 exists in the learning DB 32 (S3: YES), the process proceeds to S7. On the other hand, when it is determined that the learning result corresponding to the current vehicle condition acquired in S1 does not exist in the learning DB 32 (S3: NO), the process proceeds to S4.

In S4, the CPU 41 temporarily sets the same display luminance for each information item selected as the display target in S2. After that, a control signal is transmitted to the HUD 4, and an image for generating a virtual image 10 is output to the liquid crystal display 6 of the HUD 4 with a set brightness. For example, when a vehicle travels on a general road, an image of information on five items of "vehicle speed", "shift position", "enlarged intersection", "lane guidance", and "eco-indicator" is output to the liquid crystal display 6. Will be done. As a result, the virtual image 10 of the image of the above information is displayed in the visible front display area of the occupant 9 (for example, the driver's visual field area 25 m ahead).

Here, FIG. 6 is a diagram showing an example of information displayed by HUD4 in S4. In particular, FIG. 6 shows a case where the vehicle travels on a general road.
As shown in FIG. 6, when the vehicle travels on a general road, a virtual image 51 showing the current vehicle speed of the vehicle and the current shift position of the vehicle are shown at a position in front of a predetermined distance (25 m) in the traveling direction of the vehicle. A virtual image 52, a virtual image 53 showing an enlarged view of an intersection, a virtual image 54 showing lane guidance, and a virtual image 55 showing an eco-indicator are generated. The virtual images 51 to 55 are displayed with the same brightness. As a result, the occupant 9 can grasp the information based on each of the virtual images 51 to 55 without deviating from the line of sight from the traveling direction.

Next, in S5, the CPU 41 detects the line-of-sight start point (eye position) and the line-of-sight direction of the occupant 9 based on the image captured by the in-vehicle camera 12. As described above, the in-vehicle camera 12 is installed on the instrument panel or ceiling of the vehicle and is installed with the imaging direction facing the driver's seat, and the captured image includes the face of the occupant 9. As a method of detecting the line-of-sight start point and the line-of-sight direction, for example, there is a method of detecting using the center position of the pupil or the Purkinje image measured by the corneal reflex method. Since these methods are already known techniques, details are omitted.

Subsequently, in S5, the CPU 41 identifies the current line-of-sight position of the occupant 9 based on the detected line-of-sight start point and line-of-sight direction of the occupant 9. Specifically, as shown in FIG. 8, the CPU 41 sets the intersection of the straight line extending from the line-of-sight start point P in the line-of-sight direction α and the detection surface 61 as the line-of-sight position Q. Then, the line-of-sight position Q is specified by the X coordinate and the Y coordinate with the detection surface 61 as the coordinate system. In the present embodiment, the detection surface 61 is a virtual image display area by HUD4. That is, the line-of-sight position specified in S5 is the line-of-sight position of the occupant 9 in the current display area of the virtual image of HUD4. In S5, the gaze point of the occupant 9 may be specified as the line-of-sight position. In that case, the gaze point where the line of sight of the occupant 9 stays for a predetermined time or longer is specified as the line of sight position.

Subsequently, in S6, the CPU 41 updates the learning DB 32 based on the line-of-sight position of the occupant 9 acquired in S5. Specifically, "the number of times the driver has visually recognized" or "the time the driver has visually recognized" is counted as a learning value for each item of information in association with the current vehicle situation. Regarding which item the occupant 9 is visually recognizing among the items displayed on the HUD 4, the coordinates of the line-of-sight position of the occupant 9 acquired in S5 and the position coordinates displaying the information with respect to the display area of the HUD 4 are used. Judgment is based on. Then, when a sufficient learning value can be acquired, the number of times counted or the time is statistic for each item, and the ratio of "the number of times the driver has visually recognized" or "the time the driver has visually recognized" is used as the learning result in the learning DB 32. (See FIG. 5). After that, it returns to S3.

The processes S4 to S6 are continuously performed at regular time intervals (for example, every 200 ms) while the vehicle is running until the learning result is calculated. Further, even after the learning result is calculated once, the learning DB 32 is updated at any time every time the vehicle travels.

On the other hand, in S7, the CPU 41 reads the learning result corresponding to the current vehicle condition acquired in S1 from the learning DB 32. In particular, in the present embodiment, as a learning result, the staying mode of the line-of-sight position of the vehicle occupant 9 for each item of information is acquired. More specifically, the ratio of "the number of times the driver has visually recognized" or "the time the driver has visually recognized" (that is, the ratio of staying at the line-of-sight position) is acquired.

Next, in S8, the CPU 41 sets the display luminance for each information item selected as the display target in S2, based on the learning result read in S7. Here, in the present embodiment, the higher the ratio of the driver's line of sight staying, the more emphasized the display is, and the higher the brightness is set. Specifically, the item having the highest stay ratio is set to 100% brightness, and the other items reduce the brightness according to the stay ratio. For example, in the example of the expressway shown in FIG. 5, the "ACC setting" having the highest stay ratio is set to 100% brightness, the "vehicle speed" is set to 60% brightness, and the "shift position" and "eco indicator" are set to 20%. Let it be brightness. As a result, there will be a difference in the display mode (particularly the display brightness) for each item.

After that, in S9, the CPU 41 transmits a control signal to the HUD 4, and outputs an image for generating a virtual image 10 to the liquid crystal display 6 of the HUD 4 with the brightness set in the S8. The items to be displayed are the items of each information selected as the display target in S2. For example, when a vehicle travels on a general road, the images of information on the five items of "vehicle speed", "shift position", "enlarged view of intersection", "lane guidance", and "eco-indicator" have different brightness. It is output to the liquid crystal display 6. As a result, the virtual image 10 of the image of the above information is displayed in the visible front display area of the occupant 9 (for example, the driver's visual field area 25 m ahead).

Here, FIG. 8 is a diagram showing an example of the information displayed by the HUD 4 in S9. In particular, FIG. 8 shows a case where the vehicle travels on a general road.
As shown in FIG. 8, when the vehicle travels on a general road, a virtual image 51 showing the current vehicle speed of the vehicle and the current shift position of the vehicle are shown at a position in front of a predetermined distance (25 m) in the traveling direction of the vehicle. A virtual image 52, a virtual image 53 showing an enlarged view of an intersection, a virtual image 54 showing lane guidance, and a virtual image 55 showing an eco-indicator are generated. Further, each virtual image 51 to 55 is displayed with the brightness set in S8. For example, the example shown in FIG. 8 shows an example in which the virtual image 51 indicating the current vehicle speed of the vehicle is displayed with a higher brightness than the other virtual images 52 to 55. As a result, the occupant 9 can grasp the information based on each of the virtual images 51 to 55 without deviating from the line of sight from the traveling direction. Furthermore, information items (current vehicle speed in FIG. 8) that have a high rate of stay in the driver's line of sight in the past are displayed with more emphasis than other items, so even if there is a lot of information, the driver can It becomes possible to appropriately provide the necessary information.

As described in detail above, the computer program executed by the driving information guidance device 1 and the driving information guidance device 1 according to the present embodiment acquires the current vehicle status (S1) and the driver's line-of-sight position. (S5) When displaying information on the running of the vehicle in a display area that can be seen by the driver, the current vehicle status and the driver are displayed between the items for each item that is a candidate for display as the information on the running of the vehicle. Since the display mode is displayed with a difference depending on the combination with the line-of-sight position (S9), it is possible to appropriately provide the necessary information to the driver even when there is a large amount of information to be provided. It becomes.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various improvements and modifications can be made without departing from the gist of the present invention.
For example, in the present embodiment, the HUD 4 is configured to generate a virtual image in front of the front window 8 of the vehicle 2, but a virtual image may be generated in front of a window other than the front window 8. Further, the target for reflecting the image by the HUD 4 may be a visor (combiner) installed around the front window 8 instead of the front window 8 itself.

Further, in the present embodiment, the HUD 4 is used as a means for displaying information on the traveling of the vehicle, but a window shield display (WSD) for displaying an image on the front window 8 may be used. Further, it may be a liquid crystal display installed on an instrument panel or the like in the vehicle. When the window shield display is used, the information display area is the front window 8 of the vehicle, and when the liquid crystal display is used, the information display area is the display screen of the liquid crystal display.

Further, in the present embodiment, as a means for providing a difference in the display mode for each item of information, a difference in the displayed brightness is provided, but other means may be used. For example, a difference may be provided in the display size, display position, and the like. For example, when a difference is provided in the display size, the item with a higher percentage of staying at the line-of-sight position is displayed in a larger size. Further, when a difference is provided in the display position, the item having a higher percentage of staying in the line-of-sight position is displayed at a position closer to the center of the driver's field of view.

Further, in the present embodiment, the road type of the road on which the vehicle travels is acquired as the vehicle status, and the presence / absence of the item to be displayed and the brightness difference are set for each road type. May be used. For example, there are weather conditions, traffic conditions, and the like.

Further, in the present embodiment, the navigation ECU 15 of the navigation device 3 executes the processing of the traveling information guidance processing program (FIG. 3), but the executing subject can be changed as appropriate. For example, it may be configured to be executed by the control unit of the HUD4, the vehicle control ECU, or other in-vehicle device. When the control unit of the HUD4 executes the operation, the traveling information guidance device according to the present invention may be composed of only the HUD4.

Further, although the embodiment in which the traveling information guidance device according to the present invention is embodied has been described above, the traveling information guidance device can also have the following configuration, and in that case, the following effects are obtained.

For example, the first configuration is as follows.
Situation acquisition means (41) for acquiring the current vehicle status, line-of-sight position acquisition means (41) for acquiring the driver's line-of-sight position, and information for displaying information on the driving of the vehicle in a display area visible to the driver. It has a display means (41), and there are a plurality of items to be displayed in the display area as information regarding the driving of the vehicle, and the plurality of items displayed in the display area are targeted for each vehicle situation. The information display means includes learning means for learning the ratio of the driver's line of sight staying by relative evaluation between items, and the information display means has the plurality of learning means based on the learning result of the learning means corresponding to the current vehicle situation. The items are displayed with a difference in the display mode.
According to the traveling information guidance device having the above configuration, when providing information on the traveling of the vehicle by displaying it in the display area, the display mode is different between the items according to the situation of the vehicle. Even when there is a large amount of information to be provided, it is possible to appropriately provide the necessary information to the driver.

Further, according to the traveling information guidance device having the above configuration, it is possible to grasp what kind of information is required for each driver and each vehicle situation from the learning result. As a result, even when there is a large amount of information to be provided, it is possible to appropriately provide the necessary information to the driver.

The second configuration is as follows.
The information display means (41) emphasizes and displays the item having a higher proportion of the driver's line-of-sight position staying among the plurality of items.
According to the driving information guidance device having the above configuration, the information required by the driver is displayed with more emphasis, so that the information required by the driver can be provided even when there is a large amount of information to be provided. It will be possible to provide it appropriately.

The third configuration is as follows.
The information display means (41) displays the plurality of items with a difference in brightness displayed between the items.
According to the driving information guidance device having the above configuration, the information required by the driver is emphasized and displayed with higher brightness, so that the driver needs it even when there is a large amount of information to be provided. Information can be provided appropriately.

The fourth configuration is as follows.
The status acquisition means (41) acquires the road type of the road on which the vehicle is currently traveling as the vehicle status.
According to the traveling information guidance device having the above configuration, even when there is a large amount of information to be provided, the display mode is different between the items according to the type of road on which the vehicle is traveling. It is possible to appropriately provide necessary information according to the type of road on which the vehicle travels.

1 Driving support device 2 Vehicle 3 Navigation device 4 HUD
6 Liquid crystal display 8 Front window 10, 51-55 Virtual image 12 In-car camera 15 Navigation ECU
32 Learning DB
41 CPU
42 RAM
43 ROM

Claims (5)

Situation acquisition means to acquire the current vehicle status,
A line-of-sight position acquisition means for acquiring the driver's line-of-sight position,
It has an information display means for displaying information on the running of the vehicle in a display area that can be seen by the driver.
There are a plurality of items to be displayed in the display area as information on the running of the vehicle.
It is provided with a learning means for learning the ratio of the driver's line-of-sight position staying for a plurality of items displayed in the display area for each vehicle condition by relative evaluation between the items.
The information display means is a traveling information guidance device that displays different display modes of the plurality of items based on the learning results of the learning means corresponding to the current vehicle situation. The travel information guidance device according to claim 1 , wherein the information display means emphasizes the item in which the driver's line-of-sight position stays higher among the plurality of items. The traveling information guidance device according to claim 1 or 2 , wherein the information display means displays the plurality of items with a difference in brightness displayed between the items. The travel information guidance device according to any one of claims 1 to 3 , wherein the status acquisition means acquires the road type of the road on which the vehicle is currently traveling as the vehicle status. Computer,
Situation acquisition means to acquire the current vehicle status,
A line-of-sight position acquisition means for acquiring the driver's line-of-sight position,
Information display means for displaying information on vehicle driving in a display area visible to the driver,
There are a plurality of items to be displayed in the display area as information related to the traveling of the vehicle, and the ratio of the driver's line-of-sight position staying is between the items for the plurality of items displayed in the display area for each vehicle condition. It is a computer program to function as a learning means to learn by relative evaluation in
The information display means is a computer program that displays different display modes of the plurality of items based on the learning results of the learning means corresponding to the current vehicle situation.

Images